use options -vol without re-encode video see - http://ffmpeg-users.933282.n4.nabble.com/Sound-level-td4393201.html post "Feb 16, 2012; 4:44pm" -- View this message in context: http://ffmpeg-users.933282.n4.nabble.com/sound-level-tp4580617p4584763.html Sent from the FFmpeg-users mailing list archive at Nabble.com.